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Study on the morphological equilibrium condition on river mouths and tidal inlets

Research Project

Project/Area Number 14550506
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 水工水理学
Research InstitutionTohoku University

Principal Investigator

MANO Akira  Tohoku University, Graduate school of engineering, Professor, 大学院・工学研究科, 教授 (50111258)

Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2004: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2003: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2002: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywordsriver mouths / morphological equilibrium / tidal inlets / littoral drift / tidal current / river flow / 湖汐流 / 砂州 / 閉塞
Research Abstract

River mouths and tidal inlets in sandy beaches develop sand spits by trapping littoral drift. Since narrowing of the channels often causes obstruction of flood passage or navigation, appropriate control of the channels is one of the important subjects in coastal management. The aim of this study is to find the universal condition of the morphology equilibrium for the channels in order to serve the management.
Morphological development is quantified by the sediment budget with the sediment supply from littoral drift and sediment removal by river and tidal flows. The equilibrium condition is theoretically derived as the balance of the supply and removal and is equivalent with the stationary condition of the morphology. The dimensionless channel width in equilibrium is expressed as a function of two dimensionless parameters, Φ_R and Φ_T which proportional to the relative importance of the sediment removals by the fiver flows and tidal flows to the sediment supply respectively.
This equilibrium condition on the river mouths is verified by the field data. The Indonesian rivers, Opac, Serayu, Wawar, Tipar, and Bogowanot, which all face the Indian Ocean in the south coast of Jawa Island and prone to close in the dry season for the high wave, were examined. Six major rivers in Japan were also examined.
The condition was also examined for the tidal inlets in the Pacific, Atlantic and Gulf coasts in USA. The equilibrium condition derived here is shown to be universal and to unify the river mouths and tidal inlets.

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (16 results)

All 2005 2004 2002 Other

All Journal Article (11 results) Publications (5 results)

  • [Journal Article] Dimensionless parameters to describe topographical equilibrium of coastal inlets2005

    • Author(s)
      Totok Suprijo, Akira Mano
    • Journal Title

      ICCE (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Equilibrium condition at the narrowest section of the major rivers with sand spits2005

    • Author(s)
      Tomoaki Sato, Totok Suprijo, Akira Mano
    • Journal Title

      APAC 3(印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Dimensionless parameters to describe topographical equilibrium of coastal inlets2005

    • Author(s)
      Totok Suprijo, Akira Mano
    • Journal Title

      ICCE (in print)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Equilibrium condition at the narrowest section of the major rivers with sand spits2005

    • Author(s)
      Tomoaki Sato, Totok Suprijo, Akira Mano
    • Journal Title

      APAC 3(in print)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Dimensionless parameters to describe topographical equilibrium of coastal inlets2005

    • Author(s)
      Totok Suprijo
    • Journal Title

      ICCE (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Equilibrium conditions at the narrowest section of the major rivers with sand spits2005

    • Author(s)
      Tomoaki Sato
    • Journal Title

      APAC 3(印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 河口砂州を有する主な河川の最狭開口部平衡条件2004

    • Author(s)
      佐藤智昭, Totok Suprijo, 真野明
    • Journal Title

      海岸工学 第51号

      Pages: 526-530

    • NAID

      40007353895

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Maximum flow velocity in equilibrium tidal inlets2004

    • Author(s)
      Totok Suprijo, Akira Mano
    • Journal Title

      Journal of Coastal Research SI39(CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Equilibrium condition for the narrowest cross section of major river mouths with sand spit2004

    • Author(s)
      T.Sato, T.Suprijo, A.Mano
    • Journal Title

      Proceedings of Coastal Engineering 51

      Pages: 526-530

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 河口砂州を有する主な河川の最狭開口部平衡条件2004

    • Author(s)
      佐藤智昭
    • Journal Title

      海岸工学 51巻

      Pages: 526-530

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Tidal inlet model for Wawar, Opac and Telomoyo river mouths in Indonesia2002

    • Author(s)
      Totok Suprijo, Akira Mano
    • Journal Title

      APD-IAHR

      Pages: 922-930

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Hiroyasu Kato, Akira Mano: "Flood runoff model on one kilometer mesh for the Upper Chang Jiang River"International Conference of GIS and Remote Sensing in Hydrology, Water Resources and Environment. 156-163 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Totok Suprijo, Akira Mano: "Maximum flow velocity in equilibrium tidal inlets"Journal of Coastal Research. S139(印刷中). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 富樫 昇, 真野 明: "阿武隈川の洪水時の浮遊土砂輸送"水工論文集. 48. 949-954 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Totok Suprijo, Akira Mano: "Dimensionless parameters to descrive topographical equilibrium of coastal inlets, ICCE,(2004), in print"International Conference on Coastal Engineering. (in print). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Totok Suprijo, Akira Mano: "Tidal inlet model for Wawar, Opac and Telomoyo river mouths in Indonesia"APD-IAHR. 922-930 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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